Well, first thing you do is print it out. Then you wipe your bum with it.
JK...
The squiggly line on the left shows order dates (on the X axis, with last 6 digits of the VIN on the Y axis). Basically represents the timeline of orders.
The thin blue line represents the "theoretical" date that a truck would be built, based on the assumptions stated (9/13 start of production, 6000 trucks/week), and everything being built sequentially.
The thick blue line represents the range (3-4 weeks later) that a truck would theoretically be delivered.
All the dots represent the "actual" build date. As you can see, there is no method to the madness. Ram is just building whatever they want, whenever they want. If you have a truck that's built to the left of the thin blue line, then you're "beating the average", and if it falls to the right then your time is overdue.
If you look at today's chart, I was lucky enough to have two trucks built. One was WAY overdue from May 20th. The other one was built long before it should have been (if life was fair). But life isn't fair.
This all started as a look-ahead, wishful-thinking, general idea of when someone could expect a truck to be built. Now it's just an exercise in frustration or sheer joy (depending on whether your truck is built to the left or the right of the line).